Safety elevator device.



n. HAIEK. I SAFETY ELEVATOR DEVICE.

APPLICATION FILED ma. i5. 191:.

Patented Aug. 13, 19.18

2 SHEETS-SHEET l.

'INVENTOIQ l. HAIEK.

SAFETY ELEVATOR DEVICE.

APPLICATION FILED FEB. 15. WI].

1 275, 73 n. Patentd; Aug. 1319M.

2 SHEETS-SHEET Z.

JOSEPH I-IAJ'EK, OF NORTH BRADDOCK, PENNSYLVANIA.

SAFETY ELEVATOR DEVICE.

Specification of Letters Patent. Patented Aug. 13, 1918.

Continuation of application filed July 31, 1914, Serial No. 854,342. This application filed February 15, 1917. Serial No. 148,855.

To all whom it may concern:

Be it known that I, JOSEPH I-IAJEK, a subject of the Emperor of Austria, residing at 1803 Mordough street, in North Braddock, in the county of Allegheny and State. of Pennsylvania, have invented certain new and useful Improvements in Safety Elevator Devices, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention, which is a continuation of applicants prior application No. 854,342 filed July 31, 19141, relates to a safety elevator device and has for its object to pro 'videa device'of such class as hereinafter set forth, for arresting the descent of an elevator car if the hoisting cable should break, or become slack.

Furtherobjects of the invention are to provide a safety elevator device which is simple in its construction and arrangement, strong, durable, eflicient in its use, readily set up with respect to the elevator car, and comparatively inexpensive.

With the foregoing and other objects in view the invention consists of a novel construction, combination and arrangement of parts, as hereinafter more specifically described and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications, can be resorted to which come within the scope of the claims hereunto appended In the drawings wherein like reference characters indicate corresponding parts throughout the several views Figure 1, is a front elevation, broken away, of a safety elevator device in accord ance with this invention, the latter being in an inoperative position.

Fig. 2, is a rear elevation, broken away, of a safety elevator device 1n accordance with this invention, the device being in operative position.

Fig. 3 is a view taken on line 3-3 of lFig. 2.

Referring to the drawing in detail, 1 de notes an elevator car which is elevated and lowered through the medium of a hoisting cable, not shown, and 3 and 4 denote a pair of uprights arranged at opposite sides of the elevator shaft and each of which is of angular shape in cross section. The longitudinal leg of each of said uprights 3 and 4: has one face provided with teeth, as at 5.

Secured in the car 1, at the top thereof, is an inverted yoke-shaped support 6, in which is supported the internally threaded sleeve 7, provided with a large gear wheel 8, intermediate its ends.

Journaled in one side of the support 6, as well as projecting laterally from both sides of the car 1, is a shaft 9, provided with a pinion 10, which travels upon one of the saidracks 5. Loosely mounted upon the shaft 9 is a clutching member which consists of a sleeve 11, provided with a pinion 12, the latter being cut away at one side to form a seat 13.

Journaled in the other side of the support '6, and projecting laterally from the car 1., at-the other side thereof, is the other end of shaft 9, having a pinion 15 which travels in the other rack 5. Longitudinally shiftable upon the shaft 9 is a slidably clutching member consisting of a sleeve 16, having a clutch 17 provided with aprotrusion 18, which is adapted to engage in the seat 13 and thereby rotate sleeve 11 and pinion 12, and under such condition impart motion to gear 8. The frusto-conical sleeve16 is cut away at one side to provide a shoulder 19,

and capable of bearing against the latter is a spring 20 which will positively prevent clutch 17 from sliding back to disengage from pinion 12, The sleeve 16 is cut away, as at 21, to form a recessand extending therein is an actuating lever 22, for shifting the sleeve 16 and to move the clutch 17 to engage the pinion 12.

Secured to the support 6, centrallythereof, is a bracket, which includes a vertically disposed body portion 23 and a laterally extending L-shaped arm 24, and extending through the body portion23 is a vertically movable rotatable shaft 25, which carries a centrifugal governor 26 at its upper end, and is adapted for free rotation within a relatively large cavity in the collar 27 at its lower end. Depending from the body portion 23 and arm 24, is an angle-shaped member 28, which carries a pivot pin 29. The lever 22 at its lower end is rigidly fixed to one end of the pin 29 and the other end of the. pin 29 has rigidly fixed thereto a link 30, the latter being pivotally connected tothe collar 27, as at pin 31. The governor 26 is mounted upon the shaft 25 in such manner that, when the weighted ends of the governor armsare thrown outwardly and upwardly by centrifugal force, the shaft 25 will be lowered, having pivotal connection with said arms as at, 26%, The pivotedsupporting links 26 will be moved outwardly about their lower pivots thereby causing-the. link 30 to shift and move the lever 22.

throughthemedium of pin. 29 towshift the slidable coupling member so that the clutch 17 will engage the pinion 12, to operate gear 8. V

Theshaft 25 is rotated through the me dium of, a,p1ni i i 33,which operatively engages the pinion 15. The pinion33 is carried by shaft 34 "ournaled in the arm 24; and body portion 23. Fixed to the shaft 25 is, a sleeve 35, which is splined to shaft 25 and whrh sleeve is provided with a bevel pinion 36., which meshes with a bevel gear 57 mounted on the inner end of the shaft 36L. hen the pinion 15 rides over the continuous rack it is obvious. that motion isimpartedto the shaft 25, by the interconnections just referred to, and therefore the governor 26' is in constant operation. lVhen the 'car moves at a normal. rate, the weightedarms of thegovernorassume a position; shown approximately by Fig. 1.

If, however, the cable should break, it will be obvious, that the car will suddenly increase in its downward, speed but which '6, to. further engage the free or movable ends of the friction shoes a2 which are pivot- V ally supportedon pins 43in the top of the yoke 6 and which shoes i2 will act as wedges between theguides to arrest the car. To cause the outward movement of the pins 'and; i1 the same are oppositelythreaded and retained from axial, motion, by means of a slot as therein andfixed pin 45' within the Genie; of .thispe'pent may bobtainerlfor yoke (3. There is no sudden strain upon any part of the mechanism, but all cooperate to gradually check and finally arrest the car.

1' claim:

1. In an elevator traveling in a pair of ver.tical;g,u-ides, an automatic bralrecomprising a frame mounted on said elevator, a governor adapted to revolve during the travel of'said elevator, a pair of shoes pivotally mounted on said frame and registering with said guides, a rotatablethreaded sleeve, a pair of oppositely threaded pins mounted within said rotatable sleeve, a gear rigidly mounted on said sleeve, a shaft having a pinion meshingwith said gear, a clutch mounted on said'shaft, and meansoperated by said governorat a predetern'iined high speed for operating said clutch to rotate said pinion and gear whereby said oppositely threaded pins will be moved; outwardl'y by the screwing action of said sleeve, towedge said shoes between said guides and elevator.

2. In an elevator traveling in a pair of verticalguides having racks mounted thereon, an automatic brake comprising a frame mounted on saidelevator, a governor, a pair of shoes pivotally suspended from the top of said frame and opposite said guides, a rotatable threaded sleeve mounted in the lower part of'said frame, a pair 01 oppositely threaded pins supporting said sleeve and extending into the lower part Ofi said frame, agear rigidly mounted on said-sleeve, a shaft extending between said guides, pinions on the terminals ofsaidshaft engaging said racks, a clutching member and co-acting pinion mounted on said shaft, said 00-. acting pinion meshing with said gear, and mechanism operated by said governor at a predeteri-i'iined high downwardspeed of the elevator for operating said clutching member and: co-acting pinion and meshing gear and thereby moving said oppositely thread ed pins outwardly, by the screwing action of saidsleeve, to wedge said shoes between said guides and frame.

I-nwitness whereof, I have hereuntov subscribed my name this 6th day of February,

JOSEPH nAJ-E five cents each, by addressing-the. Commissioner; of: Patentl,

Washington, In 0.! 

